Power Optimization Method for Interactive Operation of Integrated Energy Distribution System and Superior Power Grid

Abstract

Integrated energy distribution system (IEDS) plays an important role in improving energy utilization efficiency, promoting efficient utilization of renewable energy, and enhancing system reliability. IEDS can respond to the instructions of the superior power grid and realize the effective cooperation with the superior power grid. The interactive power optimization with the superior power grid is conducive to the stable operation of the superior power grid, and reflects the flexible characteristics of energy coupling. Firstly, a distribution system model considering system power flow constraints, node voltage constraints and branch current constraints, a gas distribution system model considering gas flow constraints, gas pressure constraints and pipeline flow constraints, and an energy station model considering energy flow constraints and equipment output constraints are established. Then, this paper introduces the optimization method of interactive power between IEDS and the superior power grid. This method takes the minimum deviation between the set value and the actual value of interactive power between IEDS and superior power grid as the optimization objective, and considers the operation and security constraints of IEDS, and uses YALMIP toolbox to solve the problem. Finally, the results of the upper and lower limits of interactive power, power of energy station equipment and interactive optimization are analyzed through an example. The results show that this method can better respond to the superior power grid instructions, so as to further guarantee the safe and stable operation of the superior power grid.